JP3515430B2 - Connector cap and optical cable traction tool - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector cap for housing and protecting an end of an optical connector, and an optical cable pulling tool provided with a protective hose for housing an optical fiber drawn from an optical cable end together with an optical connector at the end. Is.

[0002]

2. Description of the Related Art For example, as shown in FIG. 4, a so-called connector-equipped cable 3 (hereinafter referred to as "optical cable 3") is formed by terminating an end of an optical fiber 1 drawn from a terminal by an optical connector 2 so as to be connectable to the connector. ) Is installed in a flexible protective hose 7 provided so as to connect between a cable fixing portion 5 for gripping and fixing the end of the optical cable 3 and an end portion 6 of the optical cable pulling tool. In addition, the extra length of the optical fiber 1 and the optical connector 2 are housed. The extra length of the optical fiber 1 is bent and stored in the protective hose 7 so as to be folded back. The optical connector 3 is housed in the protective hose 7 by housing the vicinity of the joining end surface at the tip in a cap 8 to protect it from dust adhesion and damage due to impact force. In FIG. 4, the optical fiber 1 pulled out from the end of the optical cable 3 is first folded back toward the cable fixing portion 5 at the first folding portion 9 at the central portion in the axial direction of the protective hose 7, and then in the vicinity of the cable fixing portion 5. The optical connector 1 at the end of the optical fiber 1a obtained by folding back the optical fiber 1 in the direction of the tip 6 of the optical cable pulling tool at the second folding section 10, and branching the folded optical fiber 1 at the branching section 11 (for example, branching from 8 to 4 cores). Is inserted into the cap 8 to be stored and protected, and then stored near the tip portion 6 of the optical cable pulling tool. The optical fiber 1 extending from the end of the optical cable 3 to the first folded-back portion 9 includes the first folded-back portion 9 and is housed in the reinforcing tube 11 for reinforcement.
The other part of the optical fiber 1 pulled out from the end of the optical cable 3 is reinforced in the vicinity of the first folding part 9 by the reinforcing tube 11
Has been uttered by. The optical fibers 1 and 1a are, for example, multicore optical fiber ribbons, and the optical connector 2 is, for example, a so-called MT type optical connector (Mecanically Transferable) multicore optical connector ferrule established in JIS C 5981 or the like. It

FIG. 5 shows the cap 8. Cap 8
Is formed in a case shape having an opening 8c on one side by a bottom wall portion 8a and a side wall portion 8b formed around the bottom wall portion 8a, and a plurality of partition walls 8d formed inside thereof. Thus, connector housing holes 8e capable of housing the tip of the optical connector 2 are formed in multiple stages. As a result, the cap 8 can store and protect the tips of the plurality of optical connectors 2.

[0004]

By the way, it is usual that a large number of optical fibers 1 are drawn from the end of the optical cable 3 (see FIG. 4). It is necessary to utilize the volume inside the hose 7 more effectively to increase the storage amount of the optical fiber 1 and the optical connector 2. However, if a plurality of caps 8 shown in FIG. 5 are stacked and an attempt is made to store a large number of optical connectors 2 at high density, the dimension a increases by the number of the stacked caps 8 (opening of each cap 8). 8c
Is directed toward the cable fixing portion 5) and closes the inside of the protective hose 7. As a result, it becomes difficult to insert the optical fibers 1 and 1a in the vicinity of the cap 8, so that the cap 8 that houses and protects the optical connector 2 has two folded portions 9,
The protective hose 7 is stored in another storage area 14 that does not interfere with the optical fibers 1 and 1a that are bent at 10 and stored in the storage area 13, and the protective hose 7 is stored in the two storage areas 13 and 14.
However, there is a problem that the size must be increased in order to secure In view of the above problem, for example, a plurality of caps 8
By arranging the components in a dispersed manner while displacing them in the axial direction of the protective hose 7, it is possible to suppress the protruding dimension into the protective hose 7. However, in this case, a large number of optical fibers 1a drawn out from the optical connector 2 of each cap 8 are complicatedly wired in the protective hose 7, and are entangled with each other, or the optical fibers 1 and 1a can be identified when taken out. And connection becomes difficult. Further, if the fixed parts of the optical fibers 1 and 1a are provided to prevent the entanglement, a large number of fixed parts are required, which increases the man-hours for assembling the pulling tool 4 and raises the cost. It should be noted that the problem related to high-density storage of a large number of optical connectors 2 is not limited to the optical cable pulling tool 4 described above, and is the same as when a large number of optical connectors 2 are stored in a narrow area, such as an optical wiring board or a closure. Occurs in.

The present invention has been made in view of the above-mentioned problems, and has a connector cap for compactly storing the optical connector assembled at the end of the optical fiber in a high density, and an end of the optical fiber pulled out from the optical cable terminal. An object of the present invention is to provide an optical cable pulling tool capable of increasing the storage amount of optical fibers and optical connectors by efficiently storing high density optical connectors.

[0006]

According to a first aspect of the present invention, in the connector accommodating region extending to one side of the cap body, the cap has a connector accommodating hole for accommodating the tip of the MT type optical connector. A plurality of openings are formed by arranging them in the longitudinal direction of the main body, and the connector storage holes are provided with the MT type optical
Is intended for accommodating connectors one by one, moreover, these central axis of the connector housing hole, are inclined in the extending direction of each said connector housing area in the depth direction of the vertical, the connector receiving hole Near the opening of
The connector is stored in the longitudinal direction of the cap body.
A recess is formed between the protruding walls located on both sides of the hole, and inside the recess
At the rear end side facing the joint end face of the MT type optical connector
A flange for a connector , which has a shape that is expanded to the outside, can be stored, and a connector cap is provided. In the invention according to claim 2, in the connector cap according to claim 1, the longitudinal direction of the cap body
A row of the connector storage holes arranged in plural along the direction ,
A plurality of columns are arranged in parallel in the width direction perpendicular to the longitudinal direction of the cap body.
Wherein the is provided et al. From claim 3
According to the description, the connector cap according to claim 1 or 2
In addition, the connector housing hole is the length of the cap body.
Has a rectangular cross-section that is long and narrow in the width direction that is perpendicular to the hand
However, the MT type optical connector is housed and sealed.
It is characterized in that Claim 4
In the invention, the connector according to any one of claims 1 to 3.
Connector cap is inserted into the connector storage hole
Since the collar portion is stored in the recess, the collar portion is
A gap is secured between the opening and the opening.
By using this gap, the collar part can be easily picked up.
It is characterized by being able to pull.
According to the present invention, since the plurality of connector housing holes opened in the same connector housing area are inclined at the same inclination angle, the depth dimension required for forming the connector housing hole is suppressed as much as possible. As a result, the depth dimension required for housing the optical connector can be small. Further, since the optical connector whose tip is housed and protected in these connector housing holes is also inclined by the inclination of the connector housing hole, it is possible to house a large number of optical connectors in a narrow area with high density. As described in claim 2, a plurality of cores arranged along the longitudinal direction of the cap body.
Align the row of connector storage holes with the longitudinal direction of the cap body.
When the width direction Ru provided in a plurality of parallel, can also reduce the size of the connector cap in the lateral direction perpendicular to the longitudinal direction of the optical fiber,
Higher density is possible.

According to a fifth aspect of the present invention, there is provided an optical cable pulling tool assembled to an optical cable terminal, wherein a cable fixing portion for fixing the optical cable terminal and an end of the optical cable pulling tool provided apart from the cable fixing portion. Department,
The protective hose is provided so as to connect between the cable fixing portion and the tip end portion of the optical cable pulling tool, and comprises a protective hose in which the optical fiber drawn out from the optical cable terminal is stored in a curved manner. Is said claim 1
The connector cap according to any one of items 1 to 4 is housed so that the extending direction of the connector housing area is along the axial direction of the protective hose, and the connector cap is assembled into the connector housing hole of the optical fiber tip. It is characterized in that the end of the obtained optical connector is removably housed. According to this invention, by extending the extending direction of the connector housing region of the connector cap housed in the protective hose along the protective hose axial direction,
It is possible to suppress the protruding size of the connector cap into the protective hose and prevent the space inside the protective hose from being blocked. As a result, the space secured around the connector cap can be used to freely route the optical fiber in the protective hose, and the optical fiber and the optical connector can be efficiently stored in the protective hose.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIGS. In the drawing, the same components as those in FIGS. 4 and 5 are designated by the same reference numerals to simplify the description.

FIG. 1 is a perspective view showing a connector cap 20 of the present embodiment, and FIG. 2 is a side sectional view. In FIG. 1 and FIG. 2, the connector cap 20 accommodates the tip of the optical connector 2 assembled to the tip of the optical fiber 1 in a connector accommodating region 22 extending to one side of the plate-shaped cap body 21. It has a structure in which a plurality of connector housing holes 23 are formed. The central axis of each connector housing hole 23 is inclined at the same inclination angle θ with respect to the depth direction perpendicular to the extending direction of the connector housing area 22.

Specifically, the cap main body 21 is formed of a resin such as plastic in the shape of an elongated plate, and the connector housing hole 23 has one side portion of the cap main body 21 (here, the upper surface side of the cap main body 21). In addition, five cap main bodies 21 are longitudinally arranged in the longitudinal direction, and two of the cap main bodies 21 are arranged in parallel in the width direction perpendicular to the longitudinal direction to form a total of ten. The respective connector housing holes 23 are formed between the projecting walls 24 which are arranged at a plurality of positions in the longitudinal direction of the cap body 21 and arranged at a constant pitch. The protruding dimension t of the protruding wall 24 from the cap body 21 is constant. Between the pair of projecting walls 24, the cap body 21
The partition wall 25 formed along the longitudinal direction and the side walls 26 protruding on both sides in the width direction of the cap body 21 define two connector housing holes 23 adjacent to each other in the width direction of the cap body 21. Therefore, the cap body 21
The arrangement pitch of the connector housing holes 23 is constant between each row of the connector housing holes 23 that are vertically arranged in the longitudinal direction.

Each connector housing hole 23 is formed in the connector housing area 22 having a depth dimension s including the protruding dimension t of the projecting wall 24. The depth dimension s of the connector accommodating region 22 is reduced as compared with the case where the connector accommodating holes are formed without inclination because the connector accommodating holes 23 are inclined at the same inclination angle θ. It

As the optical fiber 1, for example, a multi-core optical fiber ribbon such as 4 cores or 8 cores is used, and as the optical connector 2, for example, an MT type optical connector established in JIS C 5981 is adopted. The connector housing hole 23 accommodates almost the entire connector body 2c including the tip portion near the joint end surface 2a of the optical connector 2. Connector storage hole 2
Since the inner surface of the optical connector 3 is in close contact with the outer surface of the connector body 2c, the optical connector 2 is stably stored in the connector housing hole 23 without rattling. Moreover, the connector storage hole 2
Since the optical connector 3 is hermetically sealed by housing the optical connector 2, there is no concern that dust or the like that has entered will adhere to the joint end face 2a. Furthermore, since the vicinity of the tip of the optical connector 2 that particularly affects the optical characteristics when butt-connected is covered with the cap body 21, the projecting wall 24, the partition wall 25, and the side wall 26 and is not exposed to the outside of the cap 20, Protected against contact with parts, etc., there is no risk of damage, and the desired optical characteristics can be maintained stably. The flange portion 2d having a shape in which the rear end side of the optical connector 2 facing the joint end surface 2a is expanded outward is provided with the protruding walls 2 on both sides in the vicinity of the opening 27 of the connector housing hole 23.
It is housed in a recess 28 formed between the four. Further, in this connector cap 20, since the flange portion 2d is housed in the recess 28 expanded by the step portion 29 formed by cutting out the side portion of the protruding wall 24, the cap body 21
The arrangement pitch between the optical connectors 2 housed in the connector housing holes 23 adjacent in the longitudinal direction can be reduced.

According to this connector cap 20, the tips of the plurality of optical connectors 2 can be protected and stored by the plurality of connector storage holes 23. Since the optical connector 2 whose tip is housed in the connector housing hole 23 is tilted at a constant tilt angle θ due to the tilt of the connector housing hole 23, it is pulled out from the boot 2e at the rear end of the optical connector 2 or the boot 2e. The height dimension h of the connector cap 20 including the curved space of the existing optical fiber 1 is the direction in which the optical connector 2 is not inclined and matches the depth direction (perpendicular to the plate-shaped cap body 21). It can be reduced compared to when it is stored in.

The optical connector 2 inserted at an inclination angle θ with respect to the cap main body 21 has an exposed area on the connector storage area 22 as compared with the case where the optical connector 2 is inserted in a direction coinciding with the depth direction. Since the size of the optical connector 2 becomes large, the optical connector 2 can be easily identified, and since the grippable part when the target optical connector 2 is taken out from the cap 20 is increased, there is an advantage that the workability of taking out is improved. The collar portion 2d of the optical connector 2 inserted into the connector housing hole 23 is housed in the recess 28, so that the collar portion 2d
Is particularly large, and a slight gap 28a is secured between the collar portion 2d and the connector accommodation hole opening 27. Therefore, by using this gap 28a,
The collar portion 2d can be easily picked up.

Next, as an application example of the connector cap 20, an example in which it is housed in the protective hose 7 of the optical cable pulling tool 30 is shown in FIG. In FIG. 3, the same components as those of the optical cable pulling tool 4 of FIG. 4 are designated by the same reference numerals to simplify the description. However, as the protective hose 7 described below, for example, a resin hose in which a tensile strength member such as Kevlar is embedded and fixed to improve the tensile strength is adopted.
In FIG. 3, the cable fixing portion 5 is pressed against the ring-shaped spacer 5a provided around the end of the optical cable 3 and the optical cable 3 housed inside the spacer 5a from a plurality of locations of the spacer 5a. And a connecting portion 5c protruding from the spacer 5a toward the tip 6 of the pulling tool and connected to the tension member 3a exposed at the end of the optical cable 3. The pulling tool tip portion 6 includes a tip cap 6a formed of a flexible material such as a resin foam, and an eye nut 6b provided on the tip cap 6a so as not to be pulled out. The protective hose 7 is fixed to the inner ring 5d fixed to the outer side of the spacer 5a of the cable fixing portion 5 and the end cap 6a by a fixing means (not shown). The cable fixing portion 5 and the tip end portion 6 of the pulling tool are coupled so as not to be separated from each other by bearing the tensile force acting therebetween. The circumference of the cable fixing portion 5 and the leading end portion 6 of the pulling tool is ensured waterproof by the sealing material 5e and the like, and the protective hose 7 itself is also waterproof.
A waterproof space is formed inside.

In the central portion of the protective hose 7 in the longitudinal direction, a plurality of connector caps 20 are accommodated while being shifted in the longitudinal direction of the protective hose 7. In each connector cap 20, the extension direction of the connector housing area 22 is made parallel to the axial direction of the protective hose 7, and a plurality of connector housing holes 23 arranged along the axial direction of the protective hose 7 are inclined to the cable fixing portion 5 side. It is fixed in the protective hose 7 so as to be inclined and opened.

The optical fiber 1 pulled out from the end of the optical cable 3 is firstly attached to the first portion near the tip portion 6 of the optical cable pulling tool.
It is folded back at the folding part 31 toward the cable fixing part 5,
Then, the optical fiber 1a branched from the optical fiber 1 by the branching part 33 (for example, two optical fibers 1a having 8 cores to 4 fibers are branched at the second folding part 32 near the cable fixing part 5). By being folded back toward the tip portion 6 of the optical cable pulling tool, it is curved and stored in the protective hose 7. The optical connector 2 assembled at the tip of the optical fiber 1a is housed and protected in the connector cap 20, and is housed in the housing space 34 formed between the first and second folded portions 31 and 32. .

The portion of the optical fiber 1 from the end of the optical cable 3 to the front of the first folded portion 31 is housed and reinforced by a reinforcing tube 11 such as a spiral tube. The formed optical fiber 1 is curved. 2nd folding part 32
Is formed for each optical fiber bundle obtained by bundling several optical fibers 1a, and the storage position is shifted in the axial direction of the protective hose 7 for each optical fiber bundle. As a result, the position difference of the connector cap 20 for protecting and housing the optical connector 2 in the axial direction of the protective hose 7 and the connector cap 2
The difference in the position of the connector housing hole 23 in the axial direction of the protective hose 7 in 0 is absorbed by the difference in the position of the second folded portion 32, and the optical fiber 1a from the second folded portion 32 to the optical connector 2 is excessively loosened. Etc. does not occur.

That is, in the connector cap 20, the connector housing hole 23 for housing the ends of the optical connectors 2 at the ends of the optical fibers 1a is provided in the longitudinal direction of the optical fibers 1a. Since a plurality of structures are formed by shifting the position in the (protective hose 7 axial direction), the second folding part 32 is shifted in the protective hose 7 axial direction, and the optical fiber 1a from the second folding part 32 to the optical connector 2 is formed. The extra length of the optical fiber 1a is absorbed by adjusting the length of the optical fiber. Absorption of the extra length of the optical fiber 1a due to the movement of the second folding portion 32 in the axial direction of the protective hose 7 increases, for example, when the distance between the first and second folding portions 32 increases.
Since it is possible to absorb the optical fiber 1a having a length twice that of the increase in the separation distance, the volume inside the protective hose 7 can be effectively used,
The optical fiber 1a can be stored efficiently. Since the optical fiber 1a forming the second folding section 32 has a small number of cores and is easy to bend because it is branched from the optical fiber 1, the second folding section 32 can be easily moved, and
The bending process of the optical fiber 1a in the vicinity of the second folding section 32 is also easy.

The connector cap 20 has a height dimension h.
(See FIG. 2), the storage space 34 formed between the first and second folding portions 31 and 32 can be suppressed.
Even if it is housed inside, a sufficient space can be secured around it, and the optical fibers 1, 1a can be freely routed within the protective hose 7. Therefore, it is not necessary to separately secure a storage area for the optical fibers 1 and 1a and a storage area for the optical connector 2 in the protective hose 7, and the internal volume can be effectively used. It is possible to increase the storage amount of the optical fibers 1, 1a, the optical connector 2, etc. in the protective hose 7.

The connector housing holes 23 of the connector cap 20 have a large number of arrangements in the axial direction of the protective hose 7 (longitudinal direction of the cap body 21), and are arranged in a lateral direction perpendicular to the axial direction of the protective hose 7 (width direction of the cap main body 23). It is preferable to minimize the number of arrangements in the (1) to (4), which facilitates securing a space around the connector cap 20. Further, when the lateral dimension of the connector cap 20 is large, the plurality of optical fibers 1a related to the plurality of optical connectors 2 housed in the connector cap 20 are also laterally dispersed and arranged. If the horizontal dimension of the connector cap 20 is small, for example, bundling of the caps 20 can be facilitated, and the caps 20 can be organized and stored, so that they are entangled with each other, and it is difficult to identify when taking them out. There is an advantage that inconvenience can be prevented.

According to this optical cable pulling tool 30, since the optical fibers 1, 1a and the optical connector 2 can be stored in the protective hose 7 at a high density, the number of the optical fibers 1, 1a and the storage amount of the optical connector 2 can be reduced. Can increase. By the way, the optical cable pulling tool 30 is attached to the front end or the rear end of the pulling installed optical cable 3 in the pulling direction. When the optical cable pulling tool 30 is the front end in the pulling direction, the protective hose 7 is appropriately curved so that Passing, etc. should be done smoothly. In this optical cable pulling tool 30, the cap 20, which houses and protects the optical connector 2, is attached to the first and second folding parts 31, 3 and 3.
Since the protective hose 7 is not enlarged in length because it is housed in the storage space 34 between the two, the protective hose 7 can be formed in a size and shape suitable for passage of a bent portion of the conduit, etc. Can be secured.

It is needless to say that the present invention is not limited to the above-mentioned embodiment and various modifications can be made. For example, in the above-described embodiment, the connector cap 20 including the plate-shaped cap body 21 is shown. However, as the shape of the cap body, various configurations such as a block shape and a shaft shape other than the plate shape are adopted. It is possible.
However, in order to store in a narrow area, such as storing the optical cable pulling tool in a protective hose, a plate-shaped cap body is used to suppress the height h as much as possible. Preferably. In the above-described embodiment, the configuration in which the plurality of connector housing holes are formed in an array on only one surface of the plate-shaped cap body is illustrated, but the present invention is not limited to this, and is formed on both surfaces of the plate-shaped cap body. A configuration in which a plurality of connector storage holes are formed can also be adopted. In this case, a large number of optical connectors can be stored with high density in a small space. Further, in the above-described embodiment, the configuration having 10 rows of connector housing holes in total of 2 rows × 5 is illustrated, but the number of connector housing holes arranged in one row and a plurality of connector housing holes are arranged. It goes without saying that the number of columns can be changed appropriately. The inclination angle of each connector housing hole is not constant and may be different from each other. Also, the inclination directions do not have to be the same. In the above-described embodiment, the application example to the optical cable pulling tool 30 having a configuration in which the pulling force accompanying the pulling and laying of the optical cable 3 is borne by the protective hose 7 is shown, but the present invention is not limited to this, and for example, the optical cable terminal. It is also possible to apply the pulling member or the connecting wire connected to this tension member through the protective hose and connect it to the tip of the optical cable pulling tool to apply the pulling force to the optical cable pulling tool. . Further, the object to which the connector cap of the present invention is applied is not limited to the optical cable pulling tool, and can be applied to various optical devices such as an optical wiring board and a closure.

[0024]

As described above, according to the connector cap of the first aspect, since the plurality of connector housing holes opened in the same connector housing area are inclined, the connector housing area is extended. The vertical dimension in the vertical direction can be suppressed as much as possible, and the optical connector housed in the connector housing hole is also tilted by the inclination of the connector housing hole, so that it is within a narrow area along the extending direction of the connector housing area. In addition, it has an excellent effect that a plurality of optical connectors can be compactly and densely stored. According to the invention of claim 2, a plurality of arrays are arranged along the longitudinal direction of the cap body.
The row of connector storage holes that are
In that are found arranged in multiple parallel in the width direction of the vertical, may be in the longitudinal direction of the optical fiber suppressing the size of the connector cap in the lateral direction of the vertical. Moreover, since a plurality of optical fibers related to the optical connector accommodated in the respective optical connector accommodating holes can be wired without spreading in the lateral direction in the vicinity of the connector cap, the high density of the optical connector especially in the elongated space can be achieved. It has an excellent effect that it can be easily stored.

According to the fifth aspect of the present invention, the connector cap having a structure capable of suppressing the protruding dimension into the protective hose is housed in the protective hose, so that the connector cap is protected in the protective hose. It is easy to secure a space for inserting an optical fiber in the surroundings, which allows the optical fiber to be freely routed inside the protective hose, and effectively uses the volume inside the protective hose to prevent Since the optical connector can be stored efficiently, it is possible to increase the storage amount of the optical fiber and the optical connector.

[Brief description of drawings]

FIG. 1 is an overall perspective view showing an embodiment of a connector cap of the present invention.

FIG. 2 is a front sectional view showing the connector cap of FIG.

FIG. 3 is a cross-sectional view showing one embodiment of a connector cap for an optical cable pulling tool of the present invention.

FIG. 4 is a cross-sectional view showing a conventional optical cable pulling tool.

FIG. 5 is a perspective view showing a conventional connector cap.

[Explanation of symbols]

1, 1a ... Optical fiber, 2 ... Optical connector, 3 ... Optical cable, 5 ... Cable fixing part, 6 ... Towing tool tip part, 7 ... Protective hose, 20 ... Connector cap, 21 ... Cap body, 22 ... Connector storage area , 23 ... connector storage hole,
30 ... Optical cable pulling tool, θ ... Inclination angle.

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yuichi Iizuka 1440 Rokuzaki, Sakura-shi, Chiba Fujikura Co., Ltd. Sakura Works (72) Inventor Moto Yamamoto 3-19-2 Nishishinjuku, Shinjuku-ku, Tokyo Nihon Telegraph Telephone Company (72) Inventor Hideki Hiratsuka 3-19-2 Nishishinjuku, Shinjuku-ku, Tokyo Nihon Telegraph and Telephone Corporation (56) Reference JP-A-9-197226 (JP, A) (58) Survey Areas (Int.Cl. ⁷ , DB name) G02B 6/36 G02B 6/46 G02B 6/44

Claims (5)

(57) [Claims] 1. A connector accommodating region (22) extending to one side of a cap body (21) is provided with a connector accommodating hole (23) for accommodating the tip of an MT type optical connector (2) in a removable manner. A plurality of openings are arranged in the longitudinal direction of the main body, and the connector housing holes are the MT type optical connectors.
In addition, the central axes of the connector housing holes are inclined with respect to the depth direction perpendicular to the extending direction of the connector housing area.
And near the opening (27) of the connector housing hole,
In the longitudinal direction of the cap body, the connector
A recess (28) is formed between the projecting walls (24) located on both sides of the receiving hole.
The connecting end of the MT type optical connector is formed in the recess.
The flange (2
A connector cap (20) characterized in that d) can be stored . 2. A plurality of caps are provided along the longitudinal direction of the cap body.
The rows of the connector storage holes arranged in several rows are the caps.
Connector cap according to claim 1, wherein it has been found arranged in multiple parallel in the width direction perpendicular to the longitudinal direction of the body. 3. The connector housing hole is the cap book.
Rectangular cross-sectional shape elongated in the width direction perpendicular to the longitudinal direction of the body
And has the MT-type optical connector housed and sealed
The method according to claim 1 or 2, characterized in that
Is the connector cap described in 2. 4. The tsuba inserted into the connector housing hole.
Part is housed in the recess so that the collar part and the opening part are
A gap (28a) is secured between the mouth and
By using the gap, the collar can be easily picked
Characterized by being able to raise
The connector cap according to any one of claims 1 to 3.
Pu. 5. An optical cable pulling tool assembled to an end of an optical cable (3), wherein a cable fixing portion (5) for fixing the optical cable end and an optical cable pulling tool tip provided apart from the cable fixing portion. Protective hose arranged so as to connect the portion (6), the cable fixing portion and the tip of the optical cable pulling tool, and in which the optical fiber (1, 1a) drawn out from the optical cable terminal is curved and stored. (7) is provided, and any one of claims 1 to 4 is provided in the protective hose.
Connector cap crab described (20) is accommodated in and along the extending direction of said connector housing area (22) in the axial direction of the protective hose, the connector receiving hole (23) of the connector cap, An optical cable pulling tool (3) characterized in that the optical connector tip assembled to the optical fiber tip is removably housed.
0).